Objective To investigate the anticancer efftcts and mechanism of Tan microemulsion (ME) in H22 murine hepatoma cells both in vitro and in vivo.Methods Tan was encapsulated into a ME.H22 cells were treated with Tan ME,empty ME or Tan solution both in vitro and in vivo.The mRNA levels of Caspase-3 were determined by RT-PCR assay and their distribution patterns in the tumors were analyzed by double immunofluorescence staining.Results Compared with Tan solution group,Tan ME significantly up-regulated mRNA level...